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package com.oracle.truffle.api.bytecode.test;

import static org.junit.Assert.assertEquals;

import org.junit.Test;

import com.oracle.truffle.api.bytecode.BytecodeConfig;
import com.oracle.truffle.api.bytecode.BytecodeParser;
import com.oracle.truffle.api.bytecode.BytecodeRootNode;
import com.oracle.truffle.api.bytecode.BytecodeRootNodes;
import com.oracle.truffle.api.bytecode.GenerateBytecode;
import com.oracle.truffle.api.bytecode.OperationProxy;
import com.oracle.truffle.api.dsl.GenerateCached;
import com.oracle.truffle.api.dsl.GenerateInline;
import com.oracle.truffle.api.dsl.Specialization;
import com.oracle.truffle.api.frame.FrameDescriptor;
import com.oracle.truffle.api.nodes.Node;

public class GR64005Test {
    private static final BytecodeDSLTestLanguage LANGUAGE = null;

    private static OperationProxyTestRootNode parse(BytecodeParser<OperationProxyTestRootNodeGen.Builder> builder) {
        BytecodeRootNodes<OperationProxyTestRootNode> nodes = OperationProxyTestRootNodeGen.create(LANGUAGE, BytecodeConfig.DEFAULT, builder);
        return nodes.getNode(0);
    }

    @Test
    public void testSubclassSpecializationsOrder() {
        OperationProxyTestRootNode root = parse(b -> {
            b.beginRoot();
            b.beginReturn();
            b.beginNodeInheritanceTestSubclass();
            b.emitLoadConstant(4);
            b.endNodeInheritanceTestSubclass();
            b.endReturn();
            b.endRoot();
        });

        Object result = root.getCallTarget().call();
        assertEquals(42, result);
    }

    @GenerateCached(false)
    public abstract static class BaseNode extends Node {
        abstract int execute(Object arg);

        @Specialization(guards = "arg < 10")
        public static int shouldBeFirst(@SuppressWarnings("unused") int arg) {
            return 42;
        }
    }

    @GenerateInline(false)
    @OperationProxy.Proxyable
    public abstract static class NodeInheritanceTestSubclassNode extends BaseNode {
        @Specialization
        public static int shouldBeSecond(@SuppressWarnings("unused") int arg) {
            return -1;
        }
    }

    @GenerateBytecode(languageClass = BytecodeDSLTestLanguage.class)
    @OperationProxy(NodeInheritanceTestSubclassNode.class)
    abstract static class OperationProxyTestRootNode extends DebugBytecodeRootNode implements BytecodeRootNode {

        protected OperationProxyTestRootNode(BytecodeDSLTestLanguage language, FrameDescriptor frameDescriptor) {
            super(language, frameDescriptor);
        }
    }
}
